J. L Jones et al. I Acta Materialia 55(2007)5538-5548 420 00.20406 a20 a2a4o6082o2 060810 0204060810121,4161.8 000204060.810121416 000.2040608101.2141.61.8 0608101.2141618 00204060.8101214161.8 D00.20.40608101.2141.618 上g 5.( Color) Filled contours(in steps of 0.05 mrd) represent domain switching (oo2)in the crack front during loading with a stress intensity factor of 0.71 MPa m"as a function of spatial position(X, Y) and in-plane azimuth angle, n. Crack face position and orientation are illustrated in each map as a bolded line at Y=1.0. Overlaid contour lines designate constant deviatoric stress(0. 4, 8,.. MPa), projected as a function of rotation angle n(s-),as predicted by the finite element model. The position identified by an arrow in the n=0 map is discussed in the text.0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 X [mm] Y [mm] 0.90 0.95 1.00 1.05 1.10 1.15 6 0 6 12 18 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0o 6 0 6 12 18 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 15o 6 0 6 12 18 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 30o 6 0 12 6 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 45o 6 6 0 12 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 60o 6 6 0 0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 75o 6 6 0 0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 90o 6 6 0 0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 105o 6 6 12 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 120o 0 6 6 12 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 135o 0 6 6 12 18 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 150o 0 6 6 12 18 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 165o X [mm] X [mm] Y [mm] Y [mm] Y [mm] Y [mm] X [mm] Fig. 5. (Color) Filled contours (in steps of 0.05 mrd) represent domain switching (f002) in the crack front during loading with a stress intensity factor of KI= 0.71 MPa m1/2 as a function of spatial position (X, Y) and in-plane azimuth angle, g. Crack face position and orientation are illustrated in each map as a bolded line at Y = 1.0. Overlaid contour lines designate constant deviatoric stress (0, 4, 8,... MPa), projected as a function of rotation angle g ðs n *Þ, as predicted by the finite element model. The position identified by an arrow in the g = 0 map is discussed in the text. 5542 J.L. Jones et al. / Acta Materialia 55 (2007) 5538–5548